The phrase "uncertain nature" is correct and usable in written English.
You can use it to describe something that is not known or that cannot be defined with certainty. For example, "The economic impact of the pandemic is of an uncertain nature."
Wolfowitz's purpose in raising the issue is to illustrate the uncertain nature of intelligence analysis.
This reflects the uncertain nature of recovery, but it also indicates a move towards leaner business models.
In view of its uncertain nature, he called the phenomenon X-radiation, though it also became known as Röntgen radiation.
Mr. Conn said that Internet companies also choose partnerships over deeper equity relationships because of the uncertain nature of the industry.
The long and uncertain nature of the war has not only led Washington to adjust its military strategy; it is adjusting its political strategy as well.
Harrower ropes in a few too many 21st-century targets but captures the strange uncertain nature of the public enemy/celebrity that makes the play so original.
So, for now, one of Bernanke's great strengths — comfort with the uncertain nature of monetary policy — is seen by the market as a weakness.
Several junta spokesmen, reached by phone Monday night, refused to confirm that a countercoup was under way, underscoring the uncertain nature of the events.
He may be as confused by the uncertain nature of Iraqi politics as everyone else, and he may be dealing with a movement so fractured and diverse that effective control is nearly impossible.
"It was our view," said the director of the Institute of Historical Research, "given the uncertain nature of present-day 'Britain' and 'Britishness', that such a conference had a pronounced topical relevance" - a fine example of English understatement.
The real-world problems have an uncertain nature.
